yomichan/ext/fg/js/client.js

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/*
* Copyright (C) 2016 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class Client {
constructor() {
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this.popup = new Popup();
this.lastMousePos = null;
this.lastRange = null;
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this.activateKey = 16;
this.activateBtn = 2;
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this.enabled = false;
this.options = {};
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this.fgRoot = chrome.extension.getURL('fg');
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chrome.runtime.onMessage.addListener(this.onBgMessage.bind(this));
window.addEventListener('message', this.onFrameMessage.bind(this));
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window.addEventListener('mousedown', this.onMouseDown.bind(this));
window.addEventListener('mousemove', this.onMouseMove.bind(this));
window.addEventListener('keydown', this.onKeyDown.bind(this));
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window.addEventListener('scroll', (e) => this.hidePopup());
window.addEventListener('resize', (e) => this.hidePopup());
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getOptions((opts) => {
this.setOptions(opts);
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getState((state) => this.setEnabled(state === 'enabled'));
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});
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}
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onKeyDown(e) {
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if (this.enabled && this.lastMousePos !== null && (e.keyCode === this.activateKey || e.charCode === this.activateKey)) {
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this.searchAt(this.lastMousePos);
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}
}
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onMouseMove(e) {
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this.lastMousePos = {x: e.clientX, y: e.clientY};
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if (this.enabled && (e.shiftKey || e.which === this.activateBtn)) {
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this.searchAt(this.lastMousePos);
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}
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}
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onMouseDown(e) {
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this.lastMousePos = {x: e.clientX, y: e.clientY};
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if (this.enabled && (e.shiftKey || e.which === this.activateBtn)) {
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this.searchAt(this.lastMousePos);
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} else {
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this.hidePopup();
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}
}
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onBgMessage({name, value}, sender, callback) {
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switch (name) {
case 'state':
this.setEnabled(value === 'enabled');
break;
case 'options':
this.setOptions(value);
break;
}
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callback();
}
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onFrameMessage(e) {
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const {action, data} = e.data, handlers = {
displayKanji: this.displayKanji
};
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if (handlers.hasOwnProperty(action)) {
handlers[action].call(this, data);
}
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}
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searchAt(point) {
const range = Range.fromPoint(point);
if (range === null || !range.containsPoint(point)) {
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this.hidePopup();
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return;
}
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if (this.lastRange !== null && this.lastRange.compareOrigin(range) === 0) {
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return;
}
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range.setLength(this.options.scanLength);
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findTerm(range.text(), ({results, length}) => {
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if (length === 0) {
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this.hidePopup();
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} else {
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range.setLength(length);
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renderText(
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{defs: results, root: this.fgRoot, options: this.options},
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'term-list.html',
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(content) => this.showPopup(range, content)
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);
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}
});
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}
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displayKanji(kanji) {
findKanji(kanji, (results) => {
renderText(
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{defs: results, root: this.fgRoot, options: this.options},
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'kanji-list.html',
(content) => this.popup.setContent(content)
);
});
}
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showPopup(range, content) {
this.popup.showNextTo(range.getRect(), content);
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if (this.options.selectMatchedText) {
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range.select();
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}
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this.lastRange = range;
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}
hidePopup() {
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this.popup.hide();
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if (this.options.selectMatchedText && this.lastRange !== null) {
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this.lastRange.deselect();
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}
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this.lastRange = null;
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}
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setEnabled(enabled) {
if (!(this.enabled = enabled)) {
this.hidePopup();
}
}
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setOptions(opts) {
this.options = opts;
}
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}
window.yomiClient = new Client();